131801442 has 64 divisors (see below), whose sum is σ = 300257280. Its totient is φ = 38313216.

The previous prime is 131801441. The next prime is 131801443. The reversal of 131801442 is 244108131.

It is an interprime number because it is at equal distance from previous prime (131801441) and next prime (131801443).

It is a super-2 number, since 2×131801442² = 34743240226558728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (131801441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 90363 + ... + 91809.

It is an arithmetic number, because the mean of its divisors is an integer number (4691520).

Almost surely, 2^131801442 is an apocalyptic number.

131801442 is an abundant number, since it is smaller than the sum of its proper divisors (168455838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131801442 is a wasteful number, since it uses less digits than its factorization.

131801442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1535.

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 131801442 is about 11480.4809132719. The cubic root of 131801442 is about 508.9089092220.

Adding to 131801442 its reverse (244108131), we get a palindrome (375909573).

The spelling of 131801442 in words is "one hundred thirty-one million, eight hundred one thousand, four hundred forty-two".